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Crossword clues for copper

Longman Dictionary of Contemporary English
coal/gold/copper etc mine
▪ one of the largest coal mines in the country
copper beech
copper/steel wire
▪ Electrical impulses are sent down the copper wire.
▪ It will be seen on the example artwork that there are several relatively large areas of copper.
▪ In front of the range stood the large copper tub.
▪ These small copper alloy balances had an inverted T-shaped beam supported from its centre by a suspension arm.
▪ Capshaw hurried into the hall and came back with a small copper urn.
▪ Therefore, the small amounts of copper were almost certainly added deliberately to harden the alloy without significantly debasing the silver.
▪ Flexible copper pipes are supplied with plain ends, with solder ring fittings or with tap connectors.
▪ I know that, as a teenager, he was caught stealing copper pipe from a construction site and put in jail.
▪ If space is very tight, use flexible copper pipe or plastic pipe for some if not all of the final fittings.
▪ If you have a lot of copper pipe to bend, hire a bending machine.
▪ They consist of a copper core, which carries the signal, surrounded by a braided mesh of fine copper wire.
▪ The darker green hues found in this medieval pottery were produced by using copper and brass filings.
▪ The Bisbee mines successfully produced copper and its related metals for 90 years.
▪ The darker green hues found in this medieval pottery were produced by using copper and brass filings.
▪ This technique has been used for uranium, copper, fluorine and other relatively soluble elements.
▪ Authors were generally allowed to use the coppers if they later published their work in a book.
▪ If space is very tight, use flexible copper pipe or plastic pipe for some if not all of the final fittings.
▪ To keep them clean, simply wash them and use a good copper polish.
▪ If used on copper, they will chew it up.
copper lipstick
▪ Adding the copper, which is another metal toxin, only hastened the death of the fish.
▪ Leak-Fix seals leaks in tanks made of steel, copper, lead, aluminium and glass fibre.
▪ Small quantities of copper are often fatal to invertebrates.
▪ Some countries are rich because they have oil or copper or iron.
▪ The devices wound with copper are usually replaced every two-to-five years, depending on which type you have.
▪ The first copper light of morning was creeping up Great Head bluff and spilling over the harbor.
▪ The nine-second fire was sparked by a breach of the synthetic insulation surrounding 10 hair-thin copper wires within the cord.
▪ These small copper alloy balances had an inverted T-shaped beam supported from its centre by a suspension arm.
The Collaborative International Dictionary

Copper \Cop"per\, v. t. [imp. & p. p. Coppered; p. pr. & vb. n. Coppering.] To cover or coat with copper; to sheathe with sheets of copper; as, to copper a ship.


Copper \Cop"per\, n. [OE. coper (cf. D. koper, Sw. koppar, Dan. kobber, G. kupfer), LL. cuper, fr. L. cuprum for earlier Cyprium, Cyprium aes, i.e., Cyprian brass, fr. Gr. ? of Cyprus (Gr. ?), anciently renowned for its copper mines. Cf. Cypreous.]

  1. A common metal of a reddish color, both ductile and malleable, and very tenacious. It is one of the best conductors of heat and electricity. Symbol Cu. Atomic weight 63.3. It is one of the most useful metals in itself, and also in its alloys, brass and bronze.

    Note: Copper is the only metal which occurs native abundantly in large masses; it is found also in various ores, of which the most important are chalcopyrite, chalcocite, cuprite, and malachite. Copper mixed with tin forms bell metal; with a smaller proportion, bronze; and with zinc, it forms brass, pinchbeck, and other alloys.

  2. A coin made of copper; a penny, cent, or other minor coin of copper. [Colloq.]

    My friends filled my pockets with coppers.

  3. A vessel, especially a large boiler, made of copper.

  4. pl. Specifically (Naut.), the boilers in the galley for cooking; as, a ship's coppers.

    Note: Copper is often used adjectively, commonly in the sense of made or consisting of copper, or resembling copper; as, a copper boiler, tube, etc.

    All in a hot and copper sky.

    Note: It is sometimes written in combination; as, copperplate, coppersmith, copper-colored.

    Copper finch. (Zo["o]l.) See Chaffinch.

    Copper glance, or Vitreous copper. (Min.) See Chalcocite.

    Indigo copper. (Min.) See Covelline.

Douglas Harper's Etymology Dictionary

"policeman," 1846; agent noun from cop (v.).


malleable metallic element, Old English coper, from Proto-Germanic *kupar (cognates: Middle Dutch koper, Old Norse koparr, Old High German kupfar), from Late Latin cuprum, contraction of Latin Cyprium (aes) "Cyprian (metal)," after Greek Kyprios "Cyprus" (see Cyprus).\n

\nLatin aes originally was "copper," but this was extended to its alloy with tin, bronze, and as this was far more extensively used than pure copper, the word's primary sense shifted to the alloy and a new word evolved for "copper," from the Latin form of the name of the island of Cyprus, where copper was mined. Aes passed into Germanic (which originally did not distinguish copper from its alloys) and became English ore. In Latin, aes was the common word for "cash, coin, debt, wages" in many figurative expressions. Chemical symbol Cu is from cuprum.


Etymology 1

  1. 1 Made of copper. 2 Having the reddish-brown colour/color of copper. n. 1 (lb en uncountable) a reddish-brown, malleable, ductile metallic element with high electrical and thermal conductivity, symbol Cu, and atomic number 29. 2 (lb en countable) Something made of copper. 3 The reddish-brown colour/color of copper. 4 (lb en countable) A copper coin. 5 (lb en UK archaic) A large pot, often used for heating water or washing clothes over a fire. In Australasia at least, it could also be a fixed installation made of copper, with a fire underneath and its own chimney. Generally made redundant by the advent of the washing machine. v

  2. To sheathe or coat with copper. Etymology 2

    n. (context slang law enforcement English) A police officer.

  1. n. a ductile malleable reddish-brown corrosion-resistant diamagnetic metallic element; occurs in various minerals but is the only metal that occurs abundantly in large masses; used as an electrical and thermal conductor [syn: Cu, atomic number 29]

  2. a copper penny

  3. uncomplimentary terms for a policeman [syn: bull, cop, fuzz, pig]

  4. a reddish brown the color of polished copper [syn: copper color]

  5. any of various small butterflies of the family Lycaenidae having copper colored wings


v. coat with a layer of copper


Copper is a chemical element with symbol Cu (from ) and atomic number 29. It is a soft, malleable and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a reddish-orange color. It is used as a conductor of heat and electricity, as a building material and as a constituent of various metal alloys, such as sterling silver used in jewelry, cupronickel used to make marine hardware and coins and constantan used in strain gauges and thermocouples for temperature measurement.

Copper is found as a pure metal in nature, and this was the first source of the metal to be used by humans, ca. 8000 BC. It was the first metal to be smelted from its ore, ca. 5000 BC, the first metal to be cast into a shape in a mold, ca. 4000 BC and the first metal to be purposefully alloyed with another metal, tin, to create bronze, ca. 3,500 BC.

In the Roman era, copper was principally mined on Cyprus, the origin of the name of the metal, from aes сyprium (metal of Cyprus), later corrupted to сuprum, from which the words copper (English), cuivre (French), Koper (Dutch) and Kupfer (German) are all derived. The commonly encountered compounds are copper(II) salts, which often impart blue or green colors to such minerals as azurite, malachite, and turquoise, and have been used widely and historically as pigments. Architectural structures built with copper (usually roofing elements) corrode to give green verdigris (or patina). Decorative art prominently features copper, both in the elemental metal and in compounds as pigments. Copper compounds are also used as bacteriostatic agents, fungicides, and wood preservatives.

Copper is essential to all living organisms as a trace dietary mineral because it is a key constituent of the respiratory enzyme complex cytochrome c oxidase. In molluscs and crustacea copper is a constituent of the blood pigment hemocyanin, replaced by the iron-complexed hemoglobin in fish and other vertebrates. In humans, copper is found mainly in the liver, muscle, and bone. The adult body contains between 1.4 and 2.1 mg of copper per kilogram of body weight. Hence a healthy human weighing 60 kilogram contains approximately 0.1 g of copper. However, this small amount is essential to the overall human well-being.

Copper (color)

Copper is a reddish brown color that resembles the metal copper. The first recorded use of copper as a color name in English was in 1594.

Copper (comic)

Copper is a comic strip by Kazu Kibuishi that has enjoyed both webcomic and print appearances.

Copper (disambiguation)

Copper is a reddish-colored metallic element, widely used in manufacturing and industry.

Copper may also refer to:

Copper (heraldry)

In heraldry, copper is the tincture of metallic copper. Copper has been introduced in Canadian heraldry. It is considered a metal along with Argent (silver) and Or (gold) and should be depicted as bright, new copper metal.

While not commonly used, it features prominently in the arms of the City of Whitehorse, Yukon.

Copper (TV series)

Copper is a drama television series created by Tom Fontana and Will Rokos for BBC America. It is set in 1860s New York City, during the American Civil War, and stars Tom Weston-Jones as an Irish immigrant policeman, or "copper", who patrols and resides in the Five Points neighborhood. Other cast members include Kyle Schmid, Anastasia Griffith, and Franka Potente.

The series is BBC America's first original scripted program after previously only airing co-productions and shows from the United Kingdom. Fontana, Rokos, Barry Levinson, and Christina Wayne are executive producers of the series.

The first season of 10 episodes premiered on August 19, 2012. The series was renewed for a second season of 13 episodes, which premiered on June 23, 2013. On September 19, 2013, Coppers cancellation was announced, three days before its second season finale aired.

Usage examples of "copper".

And when I asked him how an abo could possibly have known what copper looked like in the ground, he said the man had been employed at one of the mines near Nullagine.

The two women disappeared behind the afterclap, the canvas screen at the back of the wagon, and Sarah called for the servants to bring the copper hip bath and buckets of hot water from the cooking fire.

Pirem handed over a coin before Ager could dig out any coppers from his purse.

What little currency Alec had seen were crude lozenges of copper or silver, distinguished only by weight and a few crude symbols struck in.

Turning out his own pouch, Alec added two copper halfs and the Skalan silver piece.

Springs, alembics, coils of copper tubing, buckled sheets of metal, gear systems both rack-and-pinion and epicyclic, pendulums, levers, cams, cranks, differentials, bearings, pulleys, assorted tools, and stone jars containing alkahest and corrosive substances crowded every horizontal surface.

Suhl, about forty miles to the east, to see igneous granites, rhyolites, and andesites, as well the copper mines of nearby Goldlauter.

To this last is joined a drying-tube containing chloride of calcium and anhydrous copper sulphate.

Dipped ordinary paper in an aqueous solution of sulphate of copper and carbonate of ammonia and then added alkaline solutions of cochineal or equivalent coloring matter.

There at present nothing is talked of but copper mines and silver or argentiferous copper ores.

Its chief ores are smaltite and cobaltite, which are arsenides of cobalt, with more or less iron, nickel, and copper.

The salts of silver, mercury, gold, copper, nickel, and platinum, chromic and arsenious acids, cause great inflection with extreme quickness, and are deadly poisons.

She dragged a heavy copper tube out of the next crate, wiping a thick slurry of ashy mud off the mottled green surface.

If the substance to be assayed is an alloy of silver and copper, first cupel 0.

Suppose the bullion being assayed varies only a little, up or down, from 900 gold and 100 copper in the thousand, and that .